Restructure solution layout by module

src/RiskEngine/StellaOps.RiskEngine/StellaOps.RiskEngine.Worker/Worker.cs

@@ -0,0 +1,16 @@
+namespace StellaOps.RiskEngine.Worker;
+
+public class Worker(ILogger<Worker> logger) : BackgroundService
+{
+    protected override async Task ExecuteAsync(CancellationToken stoppingToken)
+    {
+        while (!stoppingToken.IsCancellationRequested)
+        {
+            if (logger.IsEnabled(LogLevel.Information))
+            {
+                logger.LogInformation("Worker running at: {time}", DateTimeOffset.Now);
+            }
+            await Task.Delay(1000, stoppingToken);
+        }
+    }
+}